We explore the prospects of adapting financial accounting concepts to sustainability accounting. To illustrate, we introduce a carbon accounting measurement framework for net-zero pledges that parallels the financial reporting framework for lease accounting (ASC Topic 842). Under this framework, entities prepare emission reduction schedules to achieve net-zero targets by a specific date. This proposed framework creates pledge asset and liability accounts (the present value of projected emissions) as beginning balances, which are amortised like lease assets and liabilities. A carbon flow statement tracks actual emissions and pledge variances, providing information regarding an entity's progress toward its net-zero target. Significant variances may result in a revised emission reduction schedule or target date. The pledges may be monitored and audited. learn more on SSRN